John w



(No Model.)

J. W. FOSTER.

SEPARABLB BOBBIN.

Patented June 29, 1897.

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V Nrrn TATES JOHN W. FOSTER, OF WVESTFIELD, MASSACHUSETTS, ASSIGNOR TO THE FOSTER MACHINE COMPANY, OF SAME PLACE.

SEPARABLE BOBBIN.

SPECIFICATION forming part of Letters Patent No. 585,199, dated June 29, 1897.

Application filed June 5, 1896. Serial No. 594,417. (No model.)

To all whom it may concern:

Be it known that I, JOHN W. FOSTER, of WVestfield, county of I-Iampden, State of Massachusetts, have invented an Improvement in Separable Bobbins, of which the following description,- in connection with the accompanyin g drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object the production of an improved bobbin particularly adapted for use in braiding-machines, whereby the thread or yarn used in such machines may be wound in masses of any desired diameter and traverse upon light tubes, preferably of paper, to be mounted upon the set of separable bobbins required for each machine. I am thus enabled to entirely dispense with the comparatively expensive bobbins noW generally used for such purposes, which bobbins are of peculiar construction, rendered necessary by the operation of the braiding-machines, and which when emptied of their thread or yarn must be sent back to the winding-mill to be refilled, entailing expense of freight and the necessary storagel'OOlIl.

By my invention a much greater amount of yarn or thread can be put on the braidingmachine at one time than is now possible, the first cost of winding is reduced, and better work is produced, the thread or yarn drawing off better, as the mass of thread on the bobbin can be gaged to run off without breaking or drawing in at the ends.

Figure 1, in side elevation and partially broken out, represents a bobbin embodying my invention, with a wound mass of thread or yarn thereon. Fig. 2 is a longitudinal sectional view of the bobbin in place on an empty tube; and Fig. 3 is an end View of the bobbin, looking toward the left, Fig. l.

The mass of thread or yarn T, Fig. 1, is cross-wound upon a tube a, of paper or other suitable material, in well-known manner in a hard compact cylindrical mass, with flat ends of any desired diameter and traverse.

To the tubes are detachably-secured two independent parts or members, each comprising a circular head and a barrel, as Z9 Z7 and c a, respectively, the barrels b and c be- 1ng herein shown as tubular, Fig. 2, and preferably slotted longitudinally at b 0 respectively, to give a lateral spring thereto.

The barrels are of like diameter and are to be inserted in the tube a, as clearly shown in Fig. 2, upon which the mass of thread or yarn is wound, the inner sides of the heads being brought up snugly against the ends of the Wound mass T, as in Fig. 1, while annular recesses b e on the inner sides of the heads receive the ends of the tube a, which usually project slightly beyond the ends of the yarn or thread mass.

The resiliency of the barrels Z) c exerts sufficient friction to retain them in place in the tube a, the inner diameter of the latter being a little less than the expanded end of the barrel, and they may be pushed in toward each other or drawn apart, according to the length of the tube, so that the bobbin is adapted to be used with tubes of various lengths.

One of the heads, as c, is provided upon its outer face with ratchet-teeth 0 to be engaged by suitable let-off mechanism, as is usual in braiding-machines, to control the thread or yarn as it is drawn off.

It will be obvious that but one set of my I improved bobbins will be needed for each machine, for as soon as one mass of thread or yarn is exhausted its tube may be removed from the bobbin and a filled tube replaced.

Should the yarn or thread become fouled in the braiding operation, the barrels of the bobbins permit the wound mass to slip or turn thereon, so that the thread will not break or draw in at the ends.

It is so meti-mes desirable to positively prevent rotative movement of the wound mass of thread or yarn relative to the toothed head of the bobbin, and for preventing such rotation I may provide the barrel 0 of the ratchethead 0 with a small lug or projection 0 (see dotted lines, Figs. 1 and 2,) preferably elongated in the direction of the length of the barrel, which permits ready insertion or wit-hdrawal of the barrel into the tube, but prevents rotative movement of the latter.

I prefer to make my bobbin of metal, as being more durable and cheaper in'the long run.

Under ordinary circumstances the friction between the tube and the barrels of the bobbin will be sufficient to control the unwinding of the thread or yarn, so that the WOUllCl mass will rotate with the bobbin as regulated by the let-cit mechanism.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-' A braiding-machine bobbin comprising a tube and two separable members, each consisting of a spring-barrel and a head having at its junction with the barrel a narrow annnlar recess of a width sufficient to receive one end of the tube, substantially as described. I

In testimony whereof I have signed my 15 name to this specification in the presence of two subscribing witnesses.

JOHN W. FOSTER.

Witnesses:

JOHN C. EDWARDs, ED\VARD F. ALLEN. 

